﻿// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
//
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For details, see
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
//
// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
//
// The  interactive user interfaces in modified source and object code versions of the Program must
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
//
// Pursuant to Section 7(b) of the License you must retain the original Product logo when
// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
// trademark law for use of our trademarks.
//
// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode

namespace ASC.Web.Core;

public class RecaptchaException : InvalidCredentialException
{
    public RecaptchaException()
    {
    }

    public RecaptchaException(string message)
        : base(message)
    {
    }
}

[Scope]
public class Recaptcha
{
    private readonly SetupInfo _setupInfo;
    private readonly IHttpClientFactory _clientFactory;

    public Recaptcha(SetupInfo setupInfo, IHttpClientFactory clientFactory)
    {
        _setupInfo = setupInfo;
        _clientFactory = clientFactory;
    }

    public async Task<bool> ValidateRecaptchaAsync(string response, string ip)
    {
        try
        {
            var data = $"secret={_setupInfo.RecaptchaPrivateKey}&remoteip={ip}&response={response}";

            var request = new HttpRequestMessage
            {
                RequestUri = new Uri(_setupInfo.RecaptchaVerifyUrl),
                Method = HttpMethod.Post,
                Content = new StringContent(data, Encoding.UTF8, "application/x-www-form-urlencoded")
            };

            var httpClient = _clientFactory.CreateClient();
            using var httpClientResponse = await httpClient.SendAsync(request);
            using (var reader = new StreamReader(await httpClientResponse.Content.ReadAsStreamAsync()))
            {
                var resp = await reader.ReadToEndAsync();
                var resObj = JObject.Parse(resp);

                if (resObj["success"] != null && resObj.Value<bool>("success"))
                {
                    return true;
                }
                if (resObj["error-codes"] != null && resObj["error-codes"].HasValues)
                {
                    return false;
                }
            }
        }
        catch (Exception)
        {
        }

        return false;
    }
}
